“Being shot with Otis is so perfect because any portrait of me right now isn’t complete without my identity as a mother being a part of that. Breastfeeding is the most natural thing. I don’t know, now it feels like Otis should always be on my breast,” she told the magazine of the revealing photos.

She said the pics captured multiple aspects of her personality, even though she doesn’t usually looked so poised while she’s breastfeeding.

“It felt like we were capturing that multifaceted woman we’ve been discussing—that we know we can be. You can be someone who is at once maternal and professional and sexy and self-possessed. [But] I mean, I certainly don’t really look like that when I’m [typically] breastfeeding. And there’s usually a diaper involved.”

Most FOX411 Facebook friends thought Wilde's pic was no big thing, with many calling it "beautiful." Others commented that while there is nothing wrong with breast-feeding in public, perhaps taking a photo of it for a magazine was going a bit too far.

"Ok well it doesn't offend me in any way but I would tend to think that would be something more sacred and not blasted all over the internet," one posted, while another added: "Its natural yes but we all don't need to see it!"

Wilde also opened up about her relationship with her fiancé, Jason Sudeikis. The two have been engaged since January 2013, but they haven’t gotten around the planning their wedding. So will they ever tie the knot?

“We’re engaged, but no specific plans yet—we just have to find the time to put it together. In many ways, a child is more of a commitment. We are fully committed and really happy as a family. And there’s no definition of the ‘normal family’ anymore. Kids today are growing up with so many different definitions of family. I guess what I’m saying is that I don’t feel any pressure to do it. But I think it will be really fun.”